Why is DNA analysis useful for classification

Well, it helps us categorize organisms so we can more easily communicate biological information. Taxonomy uses hierarchical classification as a way to help scientists understand and organize the diversity of life on our planet. Hierarchical classification basically means that we classify groups within larger groups.

Explanation:

this process is called "phosphorylation." a phosphate bond joins adenosine diphosphate to form adenosine triphosphate.